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<h1 class="title">dommodel.cpp 示例文件</h1>
<span class="subtitle">itemviews/simpledommodel/dommodel.cpp</span>
<!-- $$$itemviews/simpledommodel/dommodel.cpp-description -->
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<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
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  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
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  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
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  ** $QT_END_LICENSE$
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  ****************************************************************************/</span>

  <span class="preprocessor">#include &quot;domitem.h&quot;</span>
  <span class="preprocessor">#include &quot;dommodel.h&quot;</span>

  <span class="preprocessor">#include &lt;QtXml&gt;</span>

  DomModel<span class="operator">::</span>DomModel(<span class="type">QDomDocument</span> document<span class="operator">,</span> <span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>parent)
      : <span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span>(parent)<span class="operator">,</span> domDocument(document)
  {
      rootItem <span class="operator">=</span> <span class="keyword">new</span> DomItem(domDocument<span class="operator">,</span> <span class="number">0</span>);
  }

  DomModel<span class="operator">::</span><span class="operator">~</span>DomModel()
  {
      <span class="keyword">delete</span> rootItem;
  }

  <span class="type">int</span> DomModel<span class="operator">::</span>columnCount(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&amp;</span><span class="comment">/*parent*/</span>) <span class="keyword">const</span>
  {
      <span class="keyword">return</span> <span class="number">3</span>;
  }

  <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> DomModel<span class="operator">::</span>data(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&amp;</span>index<span class="operator">,</span> <span class="type">int</span> role) <span class="keyword">const</span>
  {
      <span class="keyword">if</span> (<span class="operator">!</span>index<span class="operator">.</span>isValid())
          <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>();

      <span class="keyword">if</span> (role <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>DisplayRole)
          <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>();

      DomItem <span class="operator">*</span>item <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span>DomItem<span class="operator">*</span><span class="operator">&gt;</span>(index<span class="operator">.</span>internalPointer());

      <span class="type">QDomNode</span> node <span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>node();
      <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> attributes;
      <span class="type">QDomNamedNodeMap</span> attributeMap <span class="operator">=</span> node<span class="operator">.</span>attributes();

      <span class="keyword">switch</span> (index<span class="operator">.</span>column()) {
          <span class="keyword">case</span> <span class="number">0</span>:
              <span class="keyword">return</span> node<span class="operator">.</span>nodeName();
          <span class="keyword">case</span> <span class="number">1</span>:
              <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> attributeMap<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) {
                  <span class="type">QDomNode</span> attribute <span class="operator">=</span> attributeMap<span class="operator">.</span>item(i);
                  attributes <span class="operator">&lt;</span><span class="operator">&lt;</span> attribute<span class="operator">.</span>nodeName() <span class="operator">+</span> <span class="string">&quot;=\&quot;&quot;</span>
                                <span class="operator">+</span>attribute<span class="operator">.</span>nodeValue() <span class="operator">+</span> <span class="char">'&quot;'</span>;
              }
              <span class="keyword">return</span> attributes<span class="operator">.</span>join(<span class="char">' '</span>);
          <span class="keyword">case</span> <span class="number">2</span>:
              <span class="keyword">return</span> node<span class="operator">.</span>nodeValue()<span class="operator">.</span>split(<span class="string">&quot;\n&quot;</span>)<span class="operator">.</span>join(<span class="char">' '</span>);
          <span class="keyword">default</span>:
              <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>();
      }
  }

  <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ItemFlags DomModel<span class="operator">::</span>flags(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&amp;</span>index) <span class="keyword">const</span>
  {
      <span class="keyword">if</span> (<span class="operator">!</span>index<span class="operator">.</span>isValid())
          <span class="keyword">return</span> <span class="number">0</span>;

      <span class="keyword">return</span> <span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span><span class="operator">::</span>flags(index);
  }

  <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> DomModel<span class="operator">::</span>headerData(<span class="type">int</span> section<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Orientation orientation<span class="operator">,</span>
                                <span class="type">int</span> role) <span class="keyword">const</span>
  {
      <span class="keyword">if</span> (orientation <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal <span class="operator">&amp;</span><span class="operator">&amp;</span> role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>DisplayRole) {
          <span class="keyword">switch</span> (section) {
              <span class="keyword">case</span> <span class="number">0</span>:
                  <span class="keyword">return</span> tr(<span class="string">&quot;Name&quot;</span>);
              <span class="keyword">case</span> <span class="number">1</span>:
                  <span class="keyword">return</span> tr(<span class="string">&quot;Attributes&quot;</span>);
              <span class="keyword">case</span> <span class="number">2</span>:
                  <span class="keyword">return</span> tr(<span class="string">&quot;Value&quot;</span>);
              <span class="keyword">default</span>:
                  <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>();
          }
      }

      <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>();
  }

  <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> DomModel<span class="operator">::</span>index(<span class="type">int</span> row<span class="operator">,</span> <span class="type">int</span> column<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&amp;</span>parent)
              <span class="keyword">const</span>
  {
      <span class="keyword">if</span> (<span class="operator">!</span>hasIndex(row<span class="operator">,</span> column<span class="operator">,</span> parent))
          <span class="keyword">return</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>();

      DomItem <span class="operator">*</span>parentItem;

      <span class="keyword">if</span> (<span class="operator">!</span>parent<span class="operator">.</span>isValid())
          parentItem <span class="operator">=</span> rootItem;
      <span class="keyword">else</span>
          parentItem <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span>DomItem<span class="operator">*</span><span class="operator">&gt;</span>(parent<span class="operator">.</span>internalPointer());

      DomItem <span class="operator">*</span>childItem <span class="operator">=</span> parentItem<span class="operator">-</span><span class="operator">&gt;</span>child(row);
      <span class="keyword">if</span> (childItem)
          <span class="keyword">return</span> createIndex(row<span class="operator">,</span> column<span class="operator">,</span> childItem);
      <span class="keyword">else</span>
          <span class="keyword">return</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>();
  }

  <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> DomModel<span class="operator">::</span>parent(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&amp;</span>child) <span class="keyword">const</span>
  {
      <span class="keyword">if</span> (<span class="operator">!</span>child<span class="operator">.</span>isValid())
          <span class="keyword">return</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>();

      DomItem <span class="operator">*</span>childItem <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span>DomItem<span class="operator">*</span><span class="operator">&gt;</span>(child<span class="operator">.</span>internalPointer());
      DomItem <span class="operator">*</span>parentItem <span class="operator">=</span> childItem<span class="operator">-</span><span class="operator">&gt;</span>parent();

      <span class="keyword">if</span> (<span class="operator">!</span>parentItem <span class="operator">|</span><span class="operator">|</span> parentItem <span class="operator">=</span><span class="operator">=</span> rootItem)
          <span class="keyword">return</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>();

      <span class="keyword">return</span> createIndex(parentItem<span class="operator">-</span><span class="operator">&gt;</span>row()<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> parentItem);
  }

  <span class="type">int</span> DomModel<span class="operator">::</span>rowCount(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&amp;</span>parent) <span class="keyword">const</span>
  {
      <span class="keyword">if</span> (parent<span class="operator">.</span>column() <span class="operator">&gt;</span> <span class="number">0</span>)
          <span class="keyword">return</span> <span class="number">0</span>;

      DomItem <span class="operator">*</span>parentItem;

      <span class="keyword">if</span> (<span class="operator">!</span>parent<span class="operator">.</span>isValid())
          parentItem <span class="operator">=</span> rootItem;
      <span class="keyword">else</span>
          parentItem <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span>DomItem<span class="operator">*</span><span class="operator">&gt;</span>(parent<span class="operator">.</span>internalPointer());

      <span class="keyword">return</span> parentItem<span class="operator">-</span><span class="operator">&gt;</span>node()<span class="operator">.</span>childNodes()<span class="operator">.</span>count();
  }

</pre>
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<!-- @@@itemviews/simpledommodel/dommodel.cpp -->
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